A Cassegrain telescope has a hole in the main mirror. This reduces the mirror area and thus the light gathering power, but how much? Suppose a ten inch diameter mirror has a one inch diameter hole in the center. How much of the light gathering power is lost because of the hole?

Choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. a 1.0 kg block is placed on top of a 2.0 kg block. a horizontal rope pulls the 2.0 kg block across a frictionless floor with a force of 21.0 n. the coefficient between the two blocks is 0.75. does the 1.0 kg block on top slide?